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1   /*
2    * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package sun.misc;
27  
28  import java.lang.annotation.Annotation;
29  import java.lang.reflect.Executable;
30  import java.security.AccessControlContext;
31  import java.util.Map;
32  
33  import sun.reflect.ConstantPool;
34  import sun.reflect.annotation.AnnotationType;
35  import sun.nio.ch.Interruptible;
36  
37  public interface JavaLangAccess {
38      /** Return the constant pool for a class. */
39      ConstantPool getConstantPool(Class<?> klass);
40  
41      /**
42       * Compare-And-Swap the AnnotationType instance corresponding to this class.
43       * (This method only applies to annotation types.)
44       */
45      boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType);
46  
47      /**
48       * Get the AnnotationType instance corresponding to this class.
49       * (This method only applies to annotation types.)
50       */
51      AnnotationType getAnnotationType(Class<?> klass);
52  
53      /**
54       * Get the declared annotations for a given class, indexed by their types.
55       */
56      Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass);
57  
58      /**
59       * Get the array of bytes that is the class-file representation
60       * of this Class' annotations.
61       */
62      byte[] getRawClassAnnotations(Class<?> klass);
63  
64      /**
65       * Get the array of bytes that is the class-file representation
66       * of this Class' type annotations.
67       */
68      byte[] getRawClassTypeAnnotations(Class<?> klass);
69  
70      /**
71       * Get the array of bytes that is the class-file representation
72       * of this Executable's type annotations.
73       */
74      byte[] getRawExecutableTypeAnnotations(Executable executable);
75  
76      /**
77       * Returns the elements of an enum class or null if the
78       * Class object does not represent an enum type;
79       * the result is uncloned, cached, and shared by all callers.
80       */
81      <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass);
82  
83      /** Set thread's blocker field. */
84      void blockedOn(Thread t, Interruptible b);
85  
86      /**
87       * Registers a shutdown hook.
88       *
89       * It is expected that this method with registerShutdownInProgress=true
90       * is only used to register DeleteOnExitHook since the first file
91       * may be added to the delete on exit list by the application shutdown
92       * hooks.
93       *
94       * @params slot  the slot in the shutdown hook array, whose element
95       *               will be invoked in order during shutdown
96       * @params registerShutdownInProgress true to allow the hook
97       *               to be registered even if the shutdown is in progress.
98       * @params hook  the hook to be registered
99       *
100      * @throw IllegalStateException if shutdown is in progress and
101      *          the slot is not valid to register.
102      */
103     void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook);
104 
105     /**
106      * Returns the number of stack frames represented by the given throwable.
107      */
108     int getStackTraceDepth(Throwable t);
109 
110     /**
111      * Returns the ith StackTraceElement for the given throwable.
112      */
113     StackTraceElement getStackTraceElement(Throwable t, int i);
114 
115     /**
116      * Returns a new string backed by the provided character array. The
117      * character array is not copied and must never be modified after the
118      * String is created, in order to fulfill String's contract.
119      *
120      * @param chars the character array to back the string
121      * @return a newly created string whose content is the character array
122      */
123     String newStringUnsafe(char[] chars);
124 
125     /**
126      * Returns a new Thread with the given Runnable and an
127      * inherited AccessControlContext.
128      */
129     Thread newThreadWithAcc(Runnable target, AccessControlContext acc);
130 
131     /**
132      * Invokes the finalize method of the given object.
133      */
134     void invokeFinalize(Object o) throws Throwable;
135 }